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Understanding Plant Growth and Adaptations: Essential Needs for Photosynthesis

This chapter explores the fundamental needs of plants for growth and survival, focusing on the essential elements for photosynthesis: light, air (carbon dioxide), water, and nutrients. It details the importance of chlorophyll in capturing energy, the role of roots (taproots and fibrous roots) in stability and nutrient uptake, and explains the structure and functions of stems, including flexible and woody types. Each component is critical for plants to thrive, store food, and adapt to their environments over time.

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Understanding Plant Growth and Adaptations: Essential Needs for Photosynthesis

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  1. Unit AChapter 3 Plant Growth & Adaptations

  2. Basic Needs of Plants L - light A - air (carbon dioxide) W - water N - nutrients

  3. Needs for Photosynthesis C - chlorophyll L - light (energy) A - air (CO2) W - water

  4. Photosynthesis Photo = light Synthesis = putting together Light is put together with water & CO2to make food

  5. Photosynthesis

  6. Taprootone main root that grows deep into the ground

  7. Fibrous Rootsmany roots of the same size

  8. Stem • support plant and give them shape • inside stem are tubes • tubes move water, nutrients, & food to all parts of the plant • can store water and food • two types: flexible & woody

  9. Flexible Stems • thin, waxy covering protects them • small plants • live for only one growing season

  10. Woody Stem • hard and thick • layer of bark protects them • each year can grow thicker & taller • live for many years

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